Debt (Details) - Schedule of debt - USD ($) $ in Millions	May. 31, 2015	May. 31, 2014
Debt Instrument, Carrying Value [Abstract]
Total debt	$ 6.0	$ 135.8
Less lines of credit and current portion of long-term debt, Carrying Value	(6.0)	(15.8)
Total long-term debt, Carrying Value	0.0	120.0
Debt Instrument, Fair Value Disclosure [Abstract]
Debt Long Term And Short Term Outstanding, Fair Value	6.0	135.8
Less lines of credit and current portion of long-term debt, Fair Value	(6.0)	(15.8)
Total long-term debt, Fair Value	0.0	120.0
Revolving Credit Facility [Member]
Debt Instrument, Carrying Value [Abstract]
Revolving Loan (interest rate of 1.3%), Carrying Value	0.0	120.0
Debt Instrument, Fair Value Disclosure [Abstract]
Revolving Loan (interest rate of 1.3%), Fair Value	0.0	120.0
Line of Credit [Member]
Debt Instrument, Carrying Value [Abstract]
Total debt	6.0	15.8
Debt Instrument, Fair Value Disclosure [Abstract]
Debt Long Term And Short Term Outstanding, Fair Value	$ 6.0	$ 15.8

Debt Instrument, Carrying Value [Abstract]

No definition available.

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- Definition

Fair value of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

Name:	schl_DebtLongtermAndShorttermCombinedAmountFairValue
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lines Of Credit Short-Term Debt And Long-Term Debt, Fair Value

+ References

No definition available.

+ Details

Name:	schl_LinesOfCreditShortTermDebtAndLongTermDebtFairValue
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- Definition

Total of the portions of the carrying amounts as of the balance sheet date of lines of credit and short-term debt and long-term debt which are scheduled to be repaid within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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- Definition

Total of the portions of the fair value of lines of credit and short-term debt and long-term debt which are scheduled to be repaid within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- References

No definition available.

+ Details

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- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtLongtermAndShorttermCombinedAmount
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

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Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
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- Details

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- Details

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